On Fri, May 8, 2020 at 3:31 PM David Rientjes <rientjes@xxxxxxxxxx> wrote: > It doesn't make sense because it's only being done here for the entire > system, there are also per-node sysfs triggers so you could do something > like iterate over the nodemask of all nodes with memory and trigger > compaction manually and then nothing is emitted to the kernel log. > > There is new statsfs support that Red Hat is proposing that can be used > for things like this. It currently only supports KVM statistics but > adding MM statistics is something that would be a natural extension and > avoids polluting both the kernel log and /proc/vmstat. Thanks for the review. Is this what you're talking about [0] ? Very interesting! Also, I agree about the per-node compaction, it's a good point. But at the same time, having the information on the number of manual compaction triggered is interesting, at least for some users. What if we add that as a per-node stat in zoneinfo? Cheers, Guilherme [0] lore.kernel.org/kvm/20200427141816.16703-1-eesposit@xxxxxxxxxx
